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Robert James commented on HBASE-5313: ------------------------------------- This ticket seems to have been abandoned. Why? The results posted by [~he yongqiang] show a lot of performance gain: half the disk usage. Has it just been forgotten, or has a decision been made not to do this? Why? > Restructure hfiles layout for better compression > ------------------------------------------------ > > Key: HBASE-5313 > URL: https://issues.apache.org/jira/browse/HBASE-5313 > Project: HBase > Issue Type: Improvement > Components: io > Reporter: dhruba borthakur > Assignee: dhruba borthakur > > A HFile block contain a stream of key-values. Can we can organize these kvs > on the disk in a better way so that we get much greater compression ratios? > One option (thanks Prakash) is to store all the keys in the beginning of the > block (let's call this the key-section) and then store all their > corresponding values towards the end of the block. This will allow us to > not-even decompress the values when we are scanning and skipping over rows in > the block. > Any other ideas? -- This message was sent by Atlassian JIRA (v6.3.4#6332)